package sdkserver

import (
	"encoding/json"
	"net/http"

	"gac-hkrpg-go/internal/common"
)

func apiAARoundSelection(w http.ResponseWriter, r *http.Request) {
	switch r.Method {
	case http.MethodGet:
		selection, err := common.ReadAARoundSelection()
		if err != nil {
			http.Error(w, err.Error(), http.StatusInternalServerError)
			return
		}
		writeJSON(w, map[string]any{"status": 200, "selection": selection})
	case http.MethodPost:
		var request struct {
			Action      string `json:"action"`
			PeakGroupID uint32 `json:"peak_group_id"`
		}
		if err := json.NewDecoder(r.Body).Decode(&request); err != nil {
			http.Error(w, "invalid JSON", http.StatusBadRequest)
			return
		}
		if request.Action == "clear" {
			if err := common.ClearAARoundSelection(); err != nil {
				http.Error(w, err.Error(), http.StatusInternalServerError)
				return
			}
			writeJSON(w, map[string]any{"status": 200, "selection": nil})
			return
		}
		selection, err := common.SetAARoundSelection(request.PeakGroupID)
		if err != nil {
			http.Error(w, err.Error(), http.StatusBadRequest)
			return
		}
		writeJSON(w, map[string]any{"status": 200, "selection": selection})
	default:
		http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
	}
}